I am currently sailing a Futura 141 with a 8.5 sqm Tushingham Lightning sail and the stock 50cm fin. This works well for me. I am about to purchase a 7.0 sqm Tushingham X15 to extend my wind range with this board. I would like some advice to help find a good fin to work with this.

I currently plan to add an Isonic to the mix next year. It would be nice if the fin I select would also be suitable for that.

The board is mainly used for blasting on flat / choppy water. With some slalom when its on locally. I am in the 95 -100Kg range.